Sabian AAX 13 Studio Hi-Hats. AAX delivers pure, bright shimmering tones. Like stainless steel, AAX is cool, modern, and extremely efficient. With its streamlined design and sound-shaping Auto-Focus Response feature, AAX is the ultimate breakthrough in modern cymbal making. Tap with your finger or thrash with a stick, Auto-Focus Response maximizes sensitivity, equalizes high & low pitch levels, and purifies sounds by filtering out conflicting overtones. AAX sounds are pure and accurate. Ideal in the studio, ideal onstage. AAX delivers the freedom to sound great in any music.